powerpc/module: Remove arch specific module bug stuff

The last function to reference module_bug_list went in 2008's
  commit b9754568 ("powerpc: Remove dead module_find_bug code")
but I don't think that was called since 2006's
  commit 73c9ceab ("[POWERPC] Generic BUG for powerpc")

Now that the list has gone, I think we can also clean up the bug
entries in mod_arch_specific.

Lightly boot tested.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240503002317.183500-1-linux@treblig.org

arch/powerpc/include/asm/module.h

@@ -48,11 +48,6 @@ struct mod_arch_specific {
 	unsigned long tramp;
 	unsigned long tramp_regs;
 #endif
-
-	/* List of BUG addresses, source line numbers and filenames */
-	struct list_head bug_list;
-	struct bug_entry *bug_table;
-	unsigned int num_bugs;
 };
 
 /*

arch/powerpc/kernel/module.c

@@ -17,8 +17,6 @@
 #include <asm/setup.h>
 #include <asm/sections.h>
 
-static LIST_HEAD(module_bug_list);
-
 static const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
 				    const Elf_Shdr *sechdrs,
 				    const char *name)